/** initialize css counter */
#write {
    /* start numbering from h2 */
    counter-reset: h2;
}

/* keep h1 unnumbered but reset h2 when an h1 appears (e.g. document title) */
h1 {
    counter-reset: h2;
}

h2 {
    counter-reset: h3;
}

h3 {
    counter-reset: h4;
}

h4 {
    counter-reset: h5;
}

h5 {
    counter-reset: h6;
}

/** put counter result into headings */
/* Note: h1 is intentionally left without a numbering prefix.
   h2 is the top-level visible counter. */
#write h2:before {
    counter-increment: h2;
    content: counter(h2) " ";
}

/* h3 shows hierarchical number: h2.h3 */
#write h3:before,
h3.md-focus.md-heading:before {
    counter-increment: h3;
    content: counter(h2) "." counter(h3) " ";
}

/* h4 shows hierarchical number: h2.h3.h4 */
#write h4:before,
h4.md-focus.md-heading:before {
    counter-increment: h4;
    content: counter(h2) "." counter(h3) "." counter(h4) " ";
}

/* h5 shows hierarchical number: h2.h3.h4.h5 */
#write h5:before,
h5.md-focus.md-heading:before {
    counter-increment: h5;
    content: counter(h2) "." counter(h3) "." counter(h4) "." counter(h5) " ";
}

/* h6 shows hierarchical number: h2.h3.h4.h5.h6 */
#write h6:before,
h6.md-focus.md-heading:before {
    counter-increment: h6;
    content: counter(h2) "." counter(h3) "." counter(h4) "." counter(h5) "." counter(h6) " ";
}

/** override the default style for focused headings */
#write>h3.md-focus:before,
#write>h4.md-focus:before,
#write>h5.md-focus:before,
#write>h6.md-focus:before,
h3.md-focus:before,
h4.md-focus:before,
h5.md-focus:before,
h6.md-focus:before {
    counter-increment: none;
    content: inherit;
    color: inherit;
    border: inherit;
    border-radius: inherit;
    position: inherit;
    left:initial;
    float: none;
    top:initial;
    font-size: inherit;
    padding-left: inherit;
    padding-right: inherit;
    vertical-align: inherit;
    font-weight: inherit;
    line-height: inherit;
}